Hepatopancreatitis Reported on Australian Prawn Farm

AUSTRALIA - Two outbreaks of hepatopancreatitis have been reported on prawn farms in Queensland.

The affected tiger prawns were farmed in a semi-closed systems in Bundaberg and Cardwell, which are both located on Queensland's coast.

Morbidity and mortality on both farms were recorded at 3 on a scale of 0 to 5.

Affected animals ranged from 35 to 95 days post stocking.

The histopathology of the hepatopancreas in affected animals is consistent with that described for acute hepatopancreatic necrosis disease (AHPND). However, the disease does not meet the case definition for AHPND provided in the draft OIE Aquatic Code chapter.

It is vital that fish farm operatives who are responsible for farmed fish are trained in their health and
welfare. This will help to ensure that fish are free from disease and suffering whilst at the same time
promote good productivity and comply with legislation.